<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        .box {
            width: 500px;
            height: 400px;
            border: 1px solid #ccc;
            margin: 100px auto;
            overflow: hidden;
        }
        ul {
            width: 600px;
            height: 40px;
            margin-left: -1px;
            list-style: none;
        }
        li {
            float: left;
            width: 101px;
            height: 40px;
            text-align: center;
            font: 600 18px/40px "simsun";
            background-color: pink;
            cursor: pointer;
        }
        span {
            display: none;
            width: 500px;
            height: 360px;
            background-color: yellow;
            text-align: center;
            font: 700 150px/360px "simsun";
        }
        .show {
            display: block;
        }
        .current {
            background-color: yellow;
        }
    </style>

    <script>
//        window.onload = function () {
//            var boxArr = document.getElementsByClassName("box");
//            for(var i=0;i<boxArr.length;i++){
//                fn(boxArr[i]);
//            }
//            function fn(ele){
//                var liArr = ele.getElementsByTagName("li");
//                var spanArr = ele.getElementsByTagName("span");
//                for(var i=0;i<liArr.length;i++){
//                    liArr[i].index = i;
//                    liArr[i].onmouseover = function () {
//                        for(var j=0;j<liArr.length;j++){
//                            liArr[j].className = "";
//                            spanArr[j].className = "";
//                        }
//                        this.className = "current";
//                        spanArr[this.index].className = "show";
//                    }
//                }
//            }
//        }
    </script>


    <script>
window.onload = function () {
    var boxs = document.getElementsByClassName('box');
    for(var i = 0;i<boxs.length;i++){
            fn(boxs[i]);
    }

    function fn(ele) {
        var lis = ele.getElementsByTagName('li');
        var spans = ele.getElementsByTagName('span');
        for(var i =0;i<lis.length;i++){
            lis[i].index = i;
            lis[i].onmouseover = function () {
                for(var j=0;j<lis.length;j++){
                    lis[j].className='';
                    spans[j].className='';
                }
                this.className='current';
                spans[this.index].className = 'show';
            }
        }
    }
}
    </script>
</head>
<body>

<div class="box">
    <ul>
        <li class="current">鞋子</li>
        <li>袜子</li>
        <li>帽子</li>
        <li>裤子</li>
        <li>裙子</li>
    </ul>
    <span class="show">鞋子</span>
    <span>袜子</span>
    <span>帽子</span>
    <span>裤子</span>
    <span>裙子</span>
</div>

<div class="box">
    <ul>
        <li class="current">鞋子</li>
        <li>袜子</li>
        <li>帽子</li>
        <li>裤子</li>
        <li>裙子</li>
    </ul>
    <span class="show">鞋子</span>
    <span>袜子</span>
    <span>帽子</span>
    <span>裤子</span>
    <span>裙子</span>
</div>

<div class="box">
    <ul>
        <li class="current">鞋子</li>
        <li>袜子</li>
        <li>帽子</li>
        <li>裤子</li>
        <li>裙子</li>
    </ul>
    <span class="show">鞋子</span>
    <span>袜子</span>
    <span>帽子</span>
    <span>裤子</span>
    <span>裙子</span>
</div>

</body>
</html>